import type { AxiosResponse } from 'axios';
import { BACKEND_ERROR_CODE, createFlatRequest } from '@sa/axios';
import { useAuthStore } from '@/store/modules/auth';
import { $t } from '@/locales';
import { localStg } from '@/utils/storage';
import { getServiceBaseURL } from '@/utils/service';
import { handleRefreshToken, showErrorMsg } from './shared';
import type { RequestInstanceState } from './type';

const isHttpProxy = import.meta.env.DEV && import.meta.env.VITE_HTTP_PROXY === 'Y';
const { baseURL } = getServiceBaseURL(import.meta.env, isHttpProxy);

export const request = createFlatRequest<App.Service.Response, RequestInstanceState>(
  {
    baseURL,
    'axios-retry': {
      retries: 0
    },
    headers: {
      timeout: 6000
    }
  },
  {
    async onRequest(config) {
      const { headers } = config;

      // set token
      const token = localStg.get('token');
      const namespaceId = localStg.get('namespaceId');
      // const Authorization = token ? `Bearer ${token}` : null;
      headers['SNAIL-JOB-AUTH'] = token;
      headers['SNAIL-JOB-NAMESPACE-ID'] = namespaceId;
      Object.assign(headers, { 'SNAIL-JOB-AUTH': token, 'SNAIL-JOB-NAMESPACE-ID': namespaceId });

      return config;
    },
    isBackendSuccess(response) {
      // when the backend response code is "0000"(default), it means the request is success
      // to change this logic by yourself, you can modify the `VITE_SERVICE_SUCCESS_CODE` in `.env` file
      return String(response.data.status) === import.meta.env.VITE_SERVICE_SUCCESS_CODE;
    },
    async onBackendFail(response, instance) {
      const authStore = useAuthStore();

      function handleLogout() {
        authStore.resetStore();
      }

      function logoutAndCleanup() {
        handleLogout();
        window.removeEventListener('beforeunload', handleLogout);

        request.state.errMsgStack = request.state.errMsgStack.filter(msg => msg !== response.data.message);
      }

      // when the backend response code is in `logoutCodes`, it means the user will be logged out and redirected to login page
      const logoutCodes = import.meta.env.VITE_SERVICE_LOGOUT_CODES?.split(',') || [];
      if (logoutCodes.includes(response.data.status?.toString())) {
        handleLogout();
        return null;
      }

      // when the backend response code is in `modalLogoutCodes`, it means the user will be logged out by displaying a modal
      const modalLogoutCodes = import.meta.env.VITE_SERVICE_MODAL_LOGOUT_CODES?.split(',') || [];
      if (modalLogoutCodes.includes(response.data.status?.toString())) {
        request.state.errMsgStack = [...(request.state.errMsgStack || []), response.data.message];

        // prevent the user from refreshing the page
        window.addEventListener('beforeunload', handleLogout);

        // prevent repeated pop-ups
        if (!request.state.isLogout) {
          request.state.isLogout = true;
          window.$dialog?.error({
            title: $t('common.error'),
            content: $t('request.logoutWithModalMsg'),
            positiveText: $t('common.confirm'),
            maskClosable: false,
            closeOnEsc: false,
            onPositiveClick() {
              request.state.isLogout = false;
              logoutAndCleanup();
            },
            onClose() {
              request.state.isLogout = false;
              logoutAndCleanup();
            }
          });
        }

        return null;
      }

      // when the backend response code is in `expiredTokenCodes`, it means the token is expired, and refresh token
      // the api `refreshToken` can not return error code in `expiredTokenCodes`, otherwise it will be a dead loop, should return `logoutCodes` or `modalLogoutCodes`
      const expiredTokenCodes = import.meta.env.VITE_SERVICE_EXPIRED_TOKEN_CODES?.split(',') || [];
      if (expiredTokenCodes.includes(response.data.status) && !request.state.isRefreshingToken) {
        request.state.isRefreshingToken = true;

        const refreshConfig = await handleRefreshToken(response.config);

        request.state.isRefreshingToken = false;

        if (refreshConfig) {
          return instance.request(refreshConfig) as Promise<AxiosResponse>;
        }
      }

      return null;
    },
    transformBackendResponse(response) {
      return response.data.total ? response.data : response.data.data;
    },
    onError(error) {
      // when the request is fail, you can show error message

      let message = error.message;
      let backendErrorCode = '';

      // get backend error message and code
      if (String(error.code) === BACKEND_ERROR_CODE) {
        message = error.response?.data?.message || message;
        backendErrorCode = error.response?.data?.status || '';
      }

      // the error message is displayed in the modal
      const modalLogoutCodes = import.meta.env.VITE_SERVICE_MODAL_LOGOUT_CODES?.split(',') || [];
      if (modalLogoutCodes.includes(backendErrorCode)) {
        return;
      }

      // when the token is expired, refresh token and retry request, so no need to show error message
      const expiredTokenCodes = import.meta.env.VITE_SERVICE_EXPIRED_TOKEN_CODES?.split(',') || [];
      if (expiredTokenCodes.includes(backendErrorCode)) {
        return;
      }

      if (error.code === 'ERR_CANCELED') {
        return;
      }

      showErrorMsg(request.state, message);
    }
  }
);
